Digital video recorder (DVR) and network bandwidth control method thereof

Abstract

The invention relates to the field of video monitoring, and discloses a digital video recorder (DVR) and a network bandwidth control method thereof. In the invention, after receiving a remote playback or remote download request, the DVR closes all the existing remote previews so as to ensure normal remote playback or remote download in the case of lower total bandwidth; in the case of insufficient bandwidth, the earliest remote preview is deleted; and during the process of remote playback or remote download of the DVR, only an I-frame and an audio frequency frame are extracted and sent for all or part of program stream so as to further lower the demand of remote playback or remote download for the bandwidth.

Description

technical field

[0001] The invention relates to the field of video monitoring, in particular to the network bandwidth control technology for remote preview, playback and download of digital video recorders. Background technique

[0002] Digital Video Recorder (Digital Video Recorder, referred to as "DVR") is a high-tech product that combines computer technology, network technology, digital video technology, traditional video, and security technology. Disk, referred to as "DVD"), the replacement product of video tape recorder, can be applied to the fields of electric power remote monitoring, bank security monitoring, building intelligence, home anti-theft monitoring, etc., and has broad market prospects. The basic function of a digital video recorder is to convert analog audio and video signals into digital signals of the Moving Picture Experts Group (MPEG) and store them on a storage medium (such as a hard disk), and provide and record, play and manage The corresponding fun...

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